<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style type="text/css">
        body{
            background: darkseagreen;
            margin:0;
            padding:0;
        }
        .me{
            width: 100%;
            height: 80px;
            margin-top: 40px;
            margin: auto;
            text-align: center;
            line-height: 80px;
        }
        .banner{
            width: 100%;
            height: 70px;
            background: #2D2D3F;
        }
        .logout{
            display: inline-block;
            float: right;
            margin-right: 30px;
            margin-top: 10px;
            text-decoration: none;
            color: #fff;

        }
        .bottom{
            width: 100%;
            height: 50px;
            background: #2D2D3F;
            position: absolute;
            bottom: 0;
        }
    </style>
</head>
<body>
    <div class="banner">
        <a href="/logout" class="logout">退出</a>
    </div>
    <div class="me" style=""><h1>欢迎登录XXX系统</h1></div>
    <div class="bottom"></div>
</body>
</html>